Improvement in saw-mills



@L fr? NPETERS. PiOTWUTHOGRAPHER, WASHINGTON. D. C.

i dni/ted l 51am @wat @Mir-a Letters Patent 'Na 105,302, dated July 12, 1870.

IMPROVEMENT IN SAW-MILLS.

The Schedule referred to in these Lettere Patent and making par: of the same.

I, MARTIN P. CAMPBELL, of Barrington, in the county of Yates and State of New York, have invented certain Improvements in Saw-Mills, of which the following is a specification.

The first part of lnyinvention relates to making the log-carriage move automatically by the construction and arrangement of the belts and wheels that propel it.

The second part relates to the arrangement of belt or chain and wheels that turn the setting-screws.

The third relates to regulating the motion of the setting-screws to saw any thickness of stuff required.

Figure 1 is a side elevation of the operating machinery;

Figure 2, a side view of the carriage; and

Figure 3, a view of the shaft and wheels thatpropel the carriage.

A is the door of the saw-mill. The carriage-ways are placed upon it, and the propelling machinery is placed beneath it, and it is supported by the ordinary frame-work necessary in a sawlmill.

B is the driving-wheel that drives the`saw and other machinery. It may be driven by any kind of power, and it may. drive a straight or circular saw.

C is a shaft, placed horizontally at any convenient place beneath the Hoor. It has upon it band-wheels and a clutch. The clutches on the band-wheels are' alternately united with it, to change the direction of the carriage, as shown in Iig. 3; also, a conical-shaped roller, for regulating the motion of the carriage. There are two corresponding band-wheels on the main driving-shaft, and belts from them to those on the shaft G, as shown in g. 1. One belt drives the log toward the saw, and the other the other way. The wheels should be proportioned to give one slower, and `the other a quicker motion.-

D is a cone-shaped roller, that has a belt from the roller on the shaft O, to drive it. By changing the place of the belt, the motion of the carriage is changed. On one end of its shaft is a pinion, that drives the cog-wheel that moves the carriage.

E is a lever; the lower end is in a stationary fulcrum, as shown in fig. 1'. It passes through a sliding piece of timber that has connections to the clutches' of -the band-wheels R and S, so that, by moving the lever, one wheel will leave the stationary clutch T,`and move the other to it. This lever has an automatic motion given to it by the carriage, or may be moved by the hand of the operator. v

Fis a lever. It has a fulernin above the sliding piece that the other-lever passes through, and the lower end is pivoted to a sliding piece. The use -of this lever is to hold the clutch of the feed-roller in or out of connection with its driving-wheel, thus stopping the motionof the carriage, to pnt on logs, or for other purposes, without stopping the motive-power.

G is a rocking-shaft. lt is placed in a vertical position, as shown in fig. 1. At the upper end it has an armextending toward the carriage, so that the catch, a, inthe side of the carriage will moveit in o ne direction, and the catch, l, at the end of the head-block will move`it the other. This arm may have the end next to the carriage rest lin a series of notches, as shown in fig. 1. 'This arm allows the carriage to actuate the rocking-shaft. Beneath the floor itl has another arm extending from the rocking-shaft to the lever E. By the arrangement of these parts, the carriage will change its own motion without assistance from the operator. l

H is a bell-crank. It is supported by a pivot, that passes through it at the angle. The lower end is branched, and the branches pass down each side of the arm at the upper-end ofthe shaftG, and is actuated by it. Theupper end may be made in any conveulent manner that will receive a connection from the throttle-valve of au engine, or from the gate of a water-power. The use of this is to increase the power when sawing, and decrease it while the log is moving back.

I is the log-carriage. It may be made in the ordinary manner.` It must be provided with rack-gearing at the `under side, as shown-in fig. 1. It may have the ordinary blocks, for holding the log, and dogs on the blocks should be moved by a setting-screw of the ordinary construction, and at one side is the catch a, and in the head-block the catch 11, as shown in fig. 1.

J is a grooved wheel. It is fastened on one end of the setting-screw in the head-block, and tnrns it. It

has a ratchet-wheel attached to or made with it. There is also a cog-wheel, L, that turns on the end of the screw; and the wheel L is provided with a pawl that works in the ratchet, sot-hat the cog-wheel will turn this wheel J in one direction, soas to move the log toward the saw.

K is a grooved pulley. It is fastened to the end of convenient distance beyond the wheel M, with anA axle to hold the wheel in line with the other wheels. By

.having this wheel placed in this position, the head,-

block may be moved for logs of different lengths, and the belt or chain O remain of uniform tightness.

O is a belt or cha-in that transmits mol lon of `the wheel J to the wheel K, as shown in g. 2.

v to hold them in a vertical position, and they .may be held out of line by turning the screw Q, so as to carry a collar on theA screw in the place of the section or 'sections of rack turned ont of line. The use of this rack is to give motion to the wheel L, thus turning the' screws to setthelog toward the-saw. When the wheel L comes in contact in the other direction, it will not turn the screw, because the pawl will run over the ratchet. The stufio sawed will be made thinner by turning No. 1 out of line, and still thinner by turning out No. 2, and so ou. 'If necessary, each tooth of the rack may be in a section by itself', and by the size of the wheel L. Each tooth may bc made to represent any fractional part of an inch.

R and S are hand-wheels ou the shaft C. They are made to slide freely on the shaft, so that their clutches may bc alternately united with the clutch T, that is securely fastened to the shaft O. Tlieir positions are shown in fig. 3. There are corresponding band-wheels on the shaft of the motive-power, so that, by crossing the belt on one pair of wheels, as shown in 'g. 1, the required motion in either direction may be given to the carriage.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The shaft O, with its pulleys D R S and clutch T, in combination with the lever E, armed rock-shaft G, bell-crank. H, and carriage I, with its stops a and b, when coustrueted'aud arranged as shown and described.

2. The arrangement of the carriage I and grooved pulleys K N M J with belt O, when all the 'parts are constructed as set forth, and for the purpose specified. '3. The rack P, when constructed and'arrangcd as herein shown, and for the purpose specified.

MARTIN I. CAMPBELL. Witnesses:

` J OHN L.' LEWIS,

CHARLES Kn'ronum. 

